I assume eventually George was after Charming for his defiance, without the wedding really mattering anymore. Surely Midas called off the engagement once Abigail had Frederick back. So there’s no reason for George to put on a show for Midas anymore. It was now just about Charming being this renegade heir he no longer wanted.So he just needed to dump him to be sure he didn’t inherit the kingdom but everyone else was then inconsequential.
Now why Charming didn’t seem concerned prior to this I don’t know. Could he have arranged for his other to go into hiding?